Composite coated steel sheet.



PATENTED AUG. 25, 190s.;

` E. NORTON.

COMPOSITE COATED STEEL SHEET.

APPLIUATION FILED SEPT.19,1907.

l: l i:

.ESL m M UNITED STATES PATENT OEEIOE,

EDWIN NORTON, or NEW YORK, NY.

COMPOSITE COATED STEEL SHEET.

To all whom it may concern:

Be it known that I, EDWIN NORTON, a citizen of the United States, residing at New York city, in the countylof New York and State of New York, have invented new and useful Composite Coated Steel Sheets, of which the following is a specification.

My invention relates to the preparation of iron or steel sheets as a new article of manufacture, by a new process, to be used as a substitute for tin-plate.

The invention consists in sheets of uncoated, or black, steelor iron, prepared by applying thereto along the edges and lines of the intended seams solderable material in narrow bands, and in applying directly to the surface of the iron l'between said solderable bands, a different and non-solderable protective coating lwhich is non-corrosive -and acid resisting. The plates so prepared serve perfectly as a practical and commercial substitute for the common tin-plate; they are much cheaper and have other advantages as hereinafter specified.

In tin cans containing food products, the interior coating of 4tin is often attacked by sulfur, or the acids in the foods, causing injury to the contents and loss'. By my invention vthis danger is entirely avoided and a eat saving made in the amount of tin used.

n my peculiar sheets, only the lines intended for the seams are tinned (or covered with other solderablematerial) and the remainder of the surface is coated merely with.a suitable non-corrosive acid resisting material, whereby the steel is preserved from oxidizing and the contents from injury by contact with the metal. In roofing-plates also only the portions composing the'seams re uire the application of a solderable materia and the plate is more durable when the remainder of the surface is coated with a non-solderable material, which is acid proof and non-corrosive.

Where large plates are prepared parallel bands of solderable material maybe applied thereto, and the plates then divided alon the center o f the bands into sheets of the desiredsmaller size. f

Fully to understand the manner in which the plates are prepared.. reference is madeto the drawing herewith in which Figure 1 is a plan of a sheet having-the solder applied in'narrow parallel bands along the center of which the sheet may be cut.

Fig. 2\illustrates" a suitable machine for ap-A,

plying the solder.

'Specification of Letters Patent.

Application led September 19, 1907. Serial No. 393,687.

Patented Aug. 25, 1908.

The black steell sheets are first pickled in dilute sulfuric acid, as usual, to remove the oXid left from the cold rolls and to prepare the surface of the steel better to receive and retain the composite coating. The sheets are next uxed along the margins and the lines of subdivision. The solder,vor solderable material, is then applied to the fluxed lines which may be dono by the machine as shown in Fig. 2. f

1 is a bath for tliemolten solderable material in which is journaled a pair of shafts, carrying corres onding end-rollers 3, and center rollers 4, aving faces of a width corresponding to the width of the bands of solder to be applied to the sheets. The lower rollers project slightly above the molten metal and are so s aced as to come in contact only with the uxed lines on the sheet. The end-rollers 3 are secured on the shafts by set-.screws so as to be longitudinally adjustable for sheets of different widths. The upper rollers are arranged to correspond to the lower rollers, so that the two sets of rollers engage with the sheets and move them forward, While the solder is being applied by the lower set along the lines or bands, first iluxed, as aforesaid. The two shafts may be connected by gears 5 5 and operated by any. suitable means as by a beltand pulley.

The ilux may be applied by a similar ma# ,plied in bands to the black steel sheets so prepared by pickling, a suitable non-corrosive, acid resisting material is applied to the uncoated spaces, between said bands. A desirable process. for so coating the sheets is to apply by printing rollers or other suitable mechanism to said s aces, ordinary sizing o r lightvarnish, and W en the varnish has artially dried to feed the plates throu a bronzing machine, whereby the .varnis or sizing is filled with a suitable non-corrosive acid resisting metallic powder. I suggest as suitable a pure aluminum bronze powder, as

this is the best acid resisting material with,

which I am acquainted. Finally Athe sheets are subjected toa high degree of heat (above .adhere firmly to the .surface of tlie' steel sheets.

I thus produce what I term` composite coated metal sheets, which are more durable and better adapted than'theusual tinned sheets, for roofing, the manufactureof lcans and other purposes for which metal sheets are commonly used.'V My sheets are also f chea er to manufacture.

I so not here claim theprocess and the machine described as they bethesub'- ject of separate applications, but

1. As a new article of manufacture, sheets Iof iron,.6r steel, coated alongfthe lines of the intended seams and directl on the surface 'of the steel with solderab e material, and

havin the spaces intermediate said lines coate directly on the steel W1th a' non-solrial, umted to the surface of the stee by the action of heat'.

2. As a new article of manufacture, sheets of iron or steel coated along the edges and name to this specification in the two subscribing witnesses. derable, non-corroslve, acid resistln matelines of the intended seams with solderable* material applied directly on the surface of 30 point of tin and higher than the heat applied to cans for sterilization.

directly on the surface of the steel with sizing 45 or varnish, and with aluminum bronze -powder, such intermediate coating being lunited- I to the metal by the action of heat.v

In testimony'where'of I have signed my EDWIN NORTON.

Witnesses: v-

J. R. MILLWARD, M. L. BREsLnL 3. Sheets of iron or steel coated along the 40 ledges and the lines of the intended seams and presence of 

